Sewing-machine.



J. R. SCOTT.

SEWING mourn; APPLICATION FILED JUNE 1 0,'l909. RENEWEDJUNE 29, 1912.

15049312. Patented J;n.7,1913.

- To all whom may concern a'ncoiax R. scor'r, or near w'EYMoUrH,

MAssac sn-ms. AssIe-NoR To UNITED SHOE MACHINERY COMPANY, OF PATERSQN,nnw annsny, A conromrxon or NEW JERSEY.

Specificaticn of Letters Tatent.

snwmo-macnrnn.

a plicatio filed June 19, 1e09, Serial no. 501,217.. Renewed June;a9,"1912: Serial no, 706,823.

' -B'eit known that- LJAo'oe R. Soon, a

. citizen -,of the United States, residing at ilorth Weyinouth, in thec'ountyi'of Norfolk and State ofiMassachusetts, have'in'vented certainnew and usefiul' Improvements in Sewing-Machines; an'dI do herebydeclare .the-following'tohe a full, clear, and exact description of theinvention, such as .W1 ll enable'others skilledin theart to whichitaPpertainstomake and use the same.

1 The present invention relates 'tosewing I machines and moreparticularly to acast off actuating mechanism for the same. In machinesemployin a hook needle and operatingto form a chain st-itch, amovableguard or slide is. generally provided which covers .01 closes the; hookor barb of the needle while the new loop of thread is; being drawnthrough the old loop, the hook 'being uncovered while the needle ismoving in the opposite direction to permit the loop last drawn throughthe work to be freed from the hook. The cast-off, therefore, notonly hasmove'menfwith the needle but also movement relative'thereto.

The object of the present invention-is to devise a mechanism forproducing these desired movements of the cast oil which shall be simplein construction, certain in actionand notliable' to derangement 'orexcessivewvear. v In the accompanying drawings which illustrate what isnow considered the pre ferred form .of-the present invention asapplied.to a'shoe sewing machine employing a straight hooked needle and ofthewell known McKay type, such'as. is shown and described withsubstantial accuracy: in United States Patents- Nos. 36,163 dated August12, 1862, and 45,422'dated Dec. 13, 1864'. Figure 1 is a top plan viewof the needle and cast off actuating mechanisms; Fig. 2 is a sideelevationo-f the'same; Fig. 3 is a front elevation of the needle andcast off and a portionof theiractuating mechanism; and Fig. 4 is adetail in vertical transverse section on line 44, Fig. 1.

In the McKay shoe sewing machine, the straight hook needle 1 is securedat the bottom of a vertically reciprocating needle bar 2 mounted inhearings in the top and bottom plates 3 and 4 respectively of the frameof the machine. The needle baris actuated by meansjof a rocking lever 5pivoted adjusting nut 26. l

' midwayits" ends upon stud 6 carried by the fulcrum post 7. The frontend of'the tented Jan.7,1913.

rocking lever is connected by-the link 8 to the sleeve 9 fixedlysecured. upon the needle bar by? the t aperpins 10.- The rearend of therocking lever, is connected by-the link -11 to'the crankpin 12 upon'themainshaft '13 of the machine. 1

The .castoff 1511s secured at;.the bottom I jof a slide 16 mounted'in aguide-way or groove-in the needle bar, =and-.this*slide is actuated by ajlink l'l' theupper end of wh ch is. pivotally connected to the vcastoffactuating lever .18 pivoted upon the fulcrum stud 6 and given anintermittent tip-and down movementthrough a pin and'slot 0011- nection19. with the rocking lever 5," the friction clamp 20 on the fulcrum studholding theleVer' 18 stationary at the beginning o movement of therocking lever 5 until. the'lostmotion between the pin and slot has beentaken up. "Asv shown in Fig.4, this friction clamp. comprises twofriction washers 21' of leather or other suitahle'm'aterial, one on;each slde of the hub 22 of thec-ast ofl" lever and clamped tightlyagainst the same between the fla-nge 23 on the fulcrum. stud held' fromrotation by the pin 24am theiclamping piece 25 s'plined upon the studand forced toward the flange by the'split In' order 7 to permit theneedle to downwardly through the work leaving the work, a yieldingconnection as been provided between the cast of slide 16 and the link17.' This connection, as shown Fig, 2, is in the form'of a pin and slotconneccast off in contact with the up er side of the tion 27, aspringQSnormally holding the.

pin on the slide at the bottom of the slot.

The operation of. the cast off mechanism is as follows: Assuming theneedle to have reached the limit of its upward movement with a loop ofthread in its hook which is .then covered by the cast fofi, asthe'forward end .of the rocking lever 5 begins ,to move downwardly,carrying with it the needle bar and needle. .the cast ofi remainsstationary,

being held in its highestposition by the friction device until the pinon lever 5 reaches. the bottom of the slot on the cast off actuatingleven 18. "This does not occur until the hook of they needle has passedentirely beneath the cast off when, as the for-. ward .end of therocking lever 5 continues I to descend, the needle'z'md cast oil willmove the cast off 15; When the needle reachesthe stock it penetrates thesame leaving the cast,

downwardly together, the loop being cast out of thehook of the needleandup around oil, howeverg; resting noon the -upper ]siln face, thespring 28 at this time'yielding and permitting the continued downwardmovewithout moving ."the cast off, r 9A 100 of '1 thread havingbeen laidin' the hook fof .theflneedle,,.the latter begin-S to iise, the

actiiating level 18 of the cast oflt'remain ing, however, in its, lowestpositionnntil the 10st motion *inboth of-thejpin a-nd; slot con;-

'nectionsfll? and 27 have been takenfup pby which time'the hoo'k of theneedle carrying;

the new loop has risen through the work nections' between the cast 05actuating lever A5 and the'east oil-{substantially as described.

operations is comhlted' is claimed as new, is

and is beneath the cast ofi'a 'Both needleand cast off then .risetogether, draw ng the. new

reaches itshighest posi tion and .theoycle of Having thusdGSCfibQdt-llfi invention, hat

l5. :A sewing machine,

the same, a 'pivoted east-oli-lever, a friction device normally tendingto hold 'said lever stationary, saiddevice having provision foradjustment" to vary theiriction, and jco nnec" tions having lostmotion'loec-Weenthe needle. actuating, 'meane ahd v the cast-oil,substantijally as described, a 3

2. Asewing' mach1ne,=having,in combiiia-- tion, a hookedrieedle, a'roc'kingplevenfor actuating the sa'me, afulcrum for said lever, acastolf actuating lever mounted llDOIlfthQ 'fulcrunr of the rockinglever, a'friction de 40 actuating *lever stationary, a pin and slotconnection between the rocking levei aind the vicenormally tending tohold the 'ca'sto'lf cast off actuating lever,andyielding;c0n

'3. A sewing' machine, having, in coml9ination, a hooked. needle, meansfor actuating Copies of this patent may be obtained foi' L having, incombi nation, a hooked needle,,means for actuating lhaS e cribed. e

ln testimony "whereof I afiix my signature,

five cents each, by addressing W ashington, D. 0.

,side{ of the hub, means for clamping the friction vvashens'againebthehub, "lost mo,-

tiallyhs' described. ,1

tion connections-between the n eed-leact uatthe sa-meya ca st ofi, a'casto'lf. actuating le- S ver having-ahub,.fr ctmnWvashers. on each 'ingme'a'ns andthehast-ofiactuating' lever, and yielding connectionshetvveenthe cast 1 off actuati1i,9; lever and the east'off, substan 'ment oi thecastofi? levenl8- and link 17] L 4; A sewing machine, having, in combinetion, a straight hooked needle, a needle bar provided with .a groove toreceive- ,the cast .oii slide, a rocking lever for] act iating theIneedle barya fulcmimetud for said" leve'r',

atcastqfl f$lidexmonhted 'in said' gfo0v,"a xcast off carried by theslide, la". cast off actu ating leverjpivoted np'on th ejuic 'fim 'stnd"of the roeking levenja link pivotally con agement. Withlth'e end of ithe: slo'ty-pin' 11nd any, substantialljf 'ase desbfib ed; y

n: .m e mn nd, the cast dfi actuatixig lever, and 'a fi'ic-f, tiondevice for the casfiofiiactuat ng leveii normally tending tohold;;sa',id lever station {in/oomhimv" not, a hooked needle,'rneaiis qfoi-actuating device normally tending tofhold said lever the 1ever foriclemping the washer against the huh of thefleveryend eonnectiijnshaving lost. motion; between the,v needle actuati'ng; means and.thepivoted lever, -snbstan- Witnesses:'i WARREN G. OGDEN, f .ALFREDHILDRE'IH,

the i Commissioner of- Patents,

